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Ultra broadband mid-IR supercontinuum generation in Ge11.5As24Se64.5 based chalcogenide graded-index photonic crystal fiber: design and analysis

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Abstract

In this paper, we report design and numerical analysis of a Ge11.5As24Se64.5 based chalcogenide glass graded-index photonic crystal fiber structure for mid-IR ultra broadband supercontinuum generation. The proposed dispersion engineered photonic crystal fiber offers a zero dispersion wavelength at a pump wavelength of 2.8 μm. To simulate the supercontinuum generation spectrum, the orders of dispersion coefficient up to the ninth order are considered. Simulated results indicate that an ultra broadband supercontinuum spectrum spanning 1–16 μm has been achieved using a 10 mm long photonic crystal fiber structure pumped with 50 fs secant hyperbolic pulses of 3 kW at a 30dB spectral intensity level. To the best of our knowledge, this is the first time such broad supercontinuum spectrum has been reported. This ultra broadband mid-IR supercontinuum spectrum is applicable in many diverse fields, including medical, defense, metrology, and spectroscopy.

© 2016 Optical Society of America

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